Refractory-brick construction for locomotive-boiler furnaces



* I. MARTIN, In. REFRACTORY BRICK CONSTRUCTION FOR LOCOMOTIVEBOILER'FURNACES.

APPLICATION FILED OCT.

Patented Mar. 16, 192()7 2 SHEETSSHEET I.

I. C. MARTIN, In.

REFRACTORY BRICK CONSTRUCTION FOR LOCOMOTIVE BOILER FURNACES.

Patented Mar. 16,1920.

APPLICATION FILED OCT. II, I9I9. 1,333,868.

JESSE C. MARTIN, JR., 0F SAN FRANCISCO, CALIFORNIA.

REFRAcToEY-BRICK CONSTRUCTION Fon LoooMoTIVE-BOILER, EURNACES.

Specification of Letters Patent.

- Patented Mar. 16, 1920.

Application led October 17, 1919. Serial No. 331,372.

To all whom it may concern:

Be it known that I, JESSE C. MARTIN, Jr., a citizen of the UnitedStates, and a resident of San Francisco, county of San Francisco, andState of California, have invented certain new and useful Improvementsin Refractory-Brick Construction for Locomotive-Boiler Furnaces.

The hereinafter described invention relates to the burning ofhydro-carbon fuel in locomotive fire boxes wherein refractory lining isrequired to prevent-burning out of the exposed steel surfaces of the rebox combustion chamber.

It is an object of the invention to place a hollow refractory brickstructure at the front end of the fire box adjacent the tubesheet'thereof through which all of the air required to be introducedinto the front of the re box for combustion purposes will be taken andto make the hollow brick structure of such length that, when it is setin place, it will extend rearwardly into the re box suiciently so thatit will be thoroughly heated by the hot furnace gases, and air takentherethrough fromthe atmosphere at normal temperature, or cold air,

will be heated and prevented from' striking the tube sheet and exposedfire box sheets and seams, causing rapid expansion and contraction andconsequently leakage, which, in locomotive practice, wherein the use ofmy inventionis amplified, means excessive cost for fire box and boilermaintenance, short life of metallic heating surfaces, and consequentloss of motive power in service.

Another object of the 'invention is to effect fuel economy by deliveringair 'required at the front end of the re box for combustion purposesthrough a hollow refractory brick structure'heated by the furnace gases,thereby .heating the air and causing a lesser amount ,of oxygen forcombustion to be required than when cold or normal temperature air isdelivered into the fire box combustion chamber..

A further object of` the invention is to make a hollow refractory rebrick or tile structure through which all of the hydrocarbon fuelinjected. into the lire box 'from the burner and all -of the airrequired for combustion at the burner end of the fire box will betaken,thereby effecting an intermingling of fuel and air throu h the outlet ofthe tile structure into the re box combustion chamber and increasing thethermal efficiency therein.

Another object of the invention is to provide in a refractory linedhydro-carbon fuel burnin locomotive fire box, a hollow refractory gr there box at the front end thereof, through which air, or fuel and air, aredelivered into the fire box combustion chamber, and which will besubstantially supported in place against jar and vibration of locomotiveroad service by the bottom refractory brick Hoor of the re boxcombustion chamber and the refractory brick end wall thereof.

In the accompanying drawings, Figure 1 is a sectional elevation of myhollow lrefractory brick structure set in place in a refractory bricklined locomotive lire box.

Fig. 2 is an end sectional view taken on line 2-2, Fig. 1.

Fig. 3 is a perspective view of the hollow refractory brick structureremoved from the re box.

Fig..4= is an end view of a modified form of the hollow refractory brickstructure.

Numeral 1 indicates a front end fired hydro-carbon burning refractorybrick lined locomotive fire box combustion chamber of practice. Numeral2 indicates one form of the hollow refractory brick structure set in thebottom of the pan between the refracto brick end wall, 3, and therefractory' brick bottom, 4., bein positioned against Wall, 3, by guide,5. umeral 6 is a hydro-carbon burner set to discharge through hollowbrick, 2, and 7 is a dam er ick structure extending into door for.admitting air throu h ho ow brick, 2,' into the combustion c amber, 1.

Numeral 8 indicates the lower rows of re.

suit and house the spray or jet of hydrocarbon fuel injected into thefire box therethrough, and in some lire pans forming the bottom of thefire box, the hollow brick may be constructed with unit memberscorresponding to the shape of the pan, for example, such as illustratedin Fig. 4.

In order to minimize the cost of manufacture and maintenance in service,as well as to better effect a close mixture and control lof air andhydro-carbon fuel therethrough, the roof of the hollow refractorystructure can be made to set well below the 'top of the refractory endwall.

In practice the ollow refractory brick is highly heated by the hotfurnace gases so that when atmospheric air is taken through dam er door,7, into the fire box combustion c amber, 1, the air is heated to arelatively high degree and cold air is entirely prevented from strikingthe exposed tubes, 8, sheets, 9, and seams, 10, of the fire box, as atpresent, which causes excessive leakage, expensive maintenance and rapiddeterioration of fire box with locomotives out of service as aconsequence, and in addition thereto, they leakage onto the highlyheated refractory bricks causes rapid expansion and contraction whichcracks and destroys the bricks causing expensive maintenance of same.

What I claim is:

l. In a refractory lined locomotive fire box, a hollow refractory brickconstructed of unit members positioned by and extending rearwardly ofthe refractory front wall thereof and held in place therein by thebottom refractory floor of the lire box whereb an air passage isprovided through the bric into the fire box combustion chamber.

2. In a refractory lined' locomotive fire box, a hollow refractory brickconstructed of unit members abutting and extending rearwardly of therefractory front wall thereof, said brick being supported on the bottomfloor of the frebox and held in place therein intermediate therefractory front wall and refractory bottom ioor of the fire box wherebyan air passage is provided throu h the brick into the lire boxcombustion c amber.

3. In a refractory lined locomotive lire box, a hollow refractory brickconstructed of unit members positioned by and extending rearwardly ofthe refractory front wall thereof, said brick being supported on thebottom-of the fire box and held in place therein by the bottomrefractory floor of the fire box, a damper door communicating with thehollow brick whereby an air passage controlled by the damper door isprovided through the brick into the fire box combustion chamber.

4. In a refractory lined locomotive fire box, a hollow refractory brickconstructed of unit members abutting and extending rearwardly of therefractory `front wall thereof, said brick being supported on the bottomfloor of the fire box and held in lace therein intermediate therefractory ront wall and refractory bottom floor ofthe fire box, adamper door Communicating with the hollow brick whereby an air passagecontrolled by the damper door is provided through the brickpinto thefire box combustion chamber.

5. In a refractory lined locomotive yfire box, a hollow refractory brickconstructed of lunit members positioned by and extending rearwardly ofthe refractory front wall thereof, said brick being supported on thebottom of the tire box and held in place therein by the bottomrefractory floor of the fire box, a damper door communicating with thehollow brick and a hydro-carbon burner set to discharge within thehollow brick whereby air through the damper door 'and hydro-carbon fuelfrom the burner are de-V livered through the hollow brick into the firebox combustion chamber.

6. In a refractory lined locomotive fire box, a hollow refractory brickconstructed of'r unit members abutting and extending rearwardly of therefractory front wall thereof, said brick being supported on the bottomfloor of the fire box and held in place therein intermediate therefractory front wall and refractory bottom Hoor of the fire box, adamper door communicati with the hollow brick and a hydro-carbon urnerset to discharge within the hollow brick whereby air through the' damperdoor and hydrocarbon fuel from the burner are delivered through thehollow brick into ,the fire box combustion chamber. y

7. In combination, a'locomotive rebox, a fire pan secured to themud ringof the rebox, a hollow refractory structure composed of bottom, side andarched roof bricks supported within the fire pan to extend rearwardly ofthe refractory front wall thereof, a damper communicating with thehollow refractory structure and a hydro-carbon burner set to dischargevwithin the hollow refractory structure whereby an air passage controlledby the damper is provided through the refractory structure and wherebyhydro-carbon fuel from the burner is delivered through the refractorystructure into the irebox combustion chamber.

8. In combination, a locomotive rebox, a

communicating with the hollow refractory the refractory structure intothe rebox comstruture and i hydro-callblln burnefr set to bustonchamber. l disc arge wit in the o ow re ractory I structure whereby anair passage controlled JESSE C' MARTIN JR' 5 by the damper s providedthrough the re- Wtnes'ses:

ractory structure and whereby hydro-car- K. E. KLEIN, bon fuel from theburner is'delvered through F. L. BROWNE.

